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S. G; ,BRXYIIEHRI Rook-Drilling Machlne. No. 207.162. Y

Patented Aug. 20, 1878.

nig

l particelitrly deserihed'. i

. .Viv

To all whom Mendy-concerti: li v` l i Belt known that I, SAMUEL Gi ylnvineof Sangue, in-the-.eonntjyv ofy Essex and State or lliassaehnsetts, Rock-DriIllingllaeh'ine7 of which the 'Fellowing is aspeciiioelton:.y .-f l f The inventioxnrelatesto a rock-drilling inaehine the motive porter loi" which is Asteam' or I make-,11o claim upon thesnil'iort of the nief chine, using either a'iripod or'eolnnm', or any other suitable suyiport. Neither ilo haven!" describe e new drill, or new modeoffiastening the drill to the pistoirrod; but I maylnsc anyl suitable orleonvenient *devices for these'iiarts of e complete machine. 1 v i My inventionr relates; partie'nlarly,4 to the have invented an.' Imm-overl n formof the piston, to thee-,vlieder,` and'to the 1 `ports aimeneneels in ilzeyeylincier' oywliien, l iiereeproeating motion of the piston lets'in and-ents when actuated by suitable po'weiyt o' the motive' powerysteam or erfanthopens" l ond closes exhaust-ports iiithoutl'tliefeil of The invention'- also:relates,particularly; to the devices for :rotating the piston carrying M. ,l v v nu the drill, consisting effe rotating bar inserted into the uppercnd ofthe ps`t`on,with devices l maehinelon the linee' .'z' ofFig. 2;

The' letter A represents theA rvlinder, which is shown partly in allor isaidli aires, the inside of its upper" aiifl -loivei' end' re-W! threads areeit,'intoivhiohf`- ps or ppers Vare serewed"'a?i`ter the `gisten is inserted and,4

when the' machine is being merle' ready toreo eration. .V Y t B 1s a semi-cylindrical'frame. (Shoivnpar tieularly m Figs. 1 and 4l.) The frame is se 'pistons return, when nfronifthe channel ENT Fries.-

^ shoreline.intron,'or si-iioiis,Mhssiionoserais..

. 'MAje H a N Esi.

niredtoV a tripod orothersniiportatT.- pcrjmrt has attached to it an arm, b, having en. opening, through which passes a screw, V, asshoxvn in Figs. l and 2. face of said frame,rnear its outer edges7 are eht `gioovos, and vin these grooves ran Ways a',

'e on the cv'linder, (shown in Figs. 1 and 4,) so

that whileuthe frame remains stationary the cylinder is' moved up and down, held by its trays in saidgrooves. tl represents a piston, the shape oi which is 'seenniost fully in the section, Fig. 2. Into its upper end inserted rot-ating; harE. Its

giippera-nd lower parts lit closely in the cylinder. v t c' o e c, Fig. 2, is seen annular grooves,

encircling the piston; aud it will be observed that, as, ier insteuee when thestrolie 1s downi D verd.' and the groove `o e 1u the upper part oi theI piston reaches the exhaust-port J, steam will escape from the elia-miel Q into said upperv groeven e and through said port J thererelleving'the back pressure of steam at the'lower end of the eylindej; and so', on. the the lower groove e e reaches the exhaustport K, steam `will escapev lt intothesaid loxver groove l eeentlthrough said port l, thereby `relievin@the,back-pressure in the lon-erelid of the eflinder; andexperiment'h asshown that une machine operatedsin this wey can work site pressure. .l f At 4the middle portion of .the lpiston `1s el `eessfnllywithout suoli provision for the lia-ek` gs, which are.1

broad groove, C', whose upper edge, C, is "'bevelet'l. v This groove istmce the length `of the stroke.. f ,l ',fltthe `lower-end of the piston 1s the p1s-` ton-rod D,to which is attached the drill;

'represeutsgthe rotary bar, and has out in.

it. a `spjrd "groove, El, in which grooveis placed a pin,.wl1iel1proiectsinto a. hole in the cylinder, i (Nots'liown in the drawings.)

, (lathe upper eed `of the rotatingfbar is `a,

` u Bythe lrateh'et-wlie'eh E2, and. pin or pewl Ef. bar Ethe-drill is rotated. As the bar gees :inte the upperv emi of the piston, the pin fitting into the spira-l groove, the piston, in'its downward stroke throws the rotating bar, and is held in position by the ratchet E2, and

luto the inner .sarl The up- I comme which closely upon the ratchet-wheel E2.

il represents the lowerend of thecylinder, into which screws the nut H1, and hetween which and the said head H is packing H2, and through 'both of which passes the piston-rod.-

l represent-s an -v'exhaust' pipe or tube, through* which passes oft steam from the exhaust-ports J and l.

represents a ratehet-wl'lcel. "(Particularl y shown in Figs. l and e.) Through its center a hole is made, and screw-threads are cut in the suine, and through which passes the feedscrew V. The said ratchet-wheel plays between two arms, secured to the cylinder by a pin or holt, as shown fully in Fig. 4. The said ratchet-wheel is operated by the pawl P, leaving arms falling: on either side of the ratchet, and said pawl hinges on the end of the feed-piu N, which passes through a short tube, M, into the cylinder, as shown in Figs. ffl, 3, and 4i.

ihebevcl C2 on the upper side of the groove C1 in the piston, in the downward stroke of the piston, strikes the feed-pin and drives it outl ward. This engages the pawl with the ratchetwheei, which rotates upon the feed-screW-V, and thus movlLs-or advances thelcylinder. The feed-pin, pushed outward, is thrown back into position by a spiral spring 'around it. (Marked 0.) lf the rock is hard, the pin-is im i. outward slightly. If the rock is soft,

the j is pushed outward farther, and correspondingly mores forward or rotates the ratchet, and thus advances the cylinder and drill just so far towardits work.

Q represents a channel in the upper part of the cylinder, and 1la like channel in the lowerA j part ot the cylinder, both ends of which channels terminate within the hollow of the cylinder, as shown in Fig. 2 at the'letters e,f, g,

and h.

S represents an orifice for letting in steam or the motive power. within the hollow of thev cylinder. l Having described and pointed out the vari-:

ons parts and devices in the make-up of my niaehine, us shown in the drawings, I will now ezplainfthc :nodo ot' operating the same, wit li.. ont, of course, explainingthc support or the.y

drill of thedrilling-niachine.

Suppose-thepiston is in the posititl'nlshowd in Fig, 2, the steainlis admitted/mnima cylinder through the port S and' flllsutliefgroove lo" in the piston. The steamcannot escape downward; but, the ports f and ebei11gopen,it rushes up and fills the space between the head et the cylinder and the upper end of the pistou. The pressure and expansion of the stealh drives the piston downward until the lower channel R andthe port h'into and lls the space within the cylinder between its head H e and f are closed at the same time, and the exhaust-port J isunclosed and the steam esspace at the lower end of the cylinder by its pressure and expansion drives the piston back port K, and allowing the-steam to rush in and lill the upper space of the-cylinder again, and

motion of the piston is explained, and the piston, formed as described,lets in and cuts on' the steam and opens and closes the exhaust-ports without the aid of valves.

Ill-order to give a rotary or 1lateral motion to the piston, and so to the drill, that the rock may be operated upon evenly at the same time the piston descends, apin in the opening near the top of lthe piston,tting intothe spiral spiral course. 0n the upward or return movepin E3 prevents the pst-onfiom returning .to

v .lution ot'v the drill is effected' and made constant in its revolution.

machine prvided with a cylinder andpiston order. It can be made shorter than any other expensive from its simplicity.

l am aware that in this class of 1nventions and it will be rot'flittle consequence to give a venton differs lfrom the saine. y

` I therefore claim as myinventiou and desire to secure by Letters Patent- 1. lua rookdrlling machine, thecombination of the piston C, wlmi, h has a broad annular groove about' its een ral part, the upper side of which is beveled, and annular grooves between the upper and lower ends of the piston and the said broad groove, fand thecylinder A, which is provided'with the *inlet-ports Se .and f gand h and the `exhaust-ports .l

2.jf.l."he combination of the piston C, the rotary bariE,- having a vspiral groove, El, in which is received a llnfastenedto the piston,

the ratchet@2 andthe pawl E?, thei'head of the cylinderl F, and the nut G,s1 ibfst-antially as shown, 'and for thcpurpose-descrihed.

' J. L. NEWTON,

I. W. WnsrEnMhnN.

shoulder, k, of the groove reaches the port g, when the steam rushes into and through the l and the shoulder i of the piston. The ports capes; but the steam 1ct into the described to its first position, uncovering the exhaustthus the cause ofthe upward and downward groove E, follows the groove downward in its,

ment ofthe piston, the ratchet-wheel E2 and its'former position, and in this way'thc revo--v Th us it will be perceived that a. rock-drilling` I constructed as herein shown is really-simple in construction, and is not likely to get 'eilt ot n'ow in use, and with great power, and is less,

a large number of patents have been issued,

description of them, or show wherein my in-l cc ce, which are placed midway, respectively,

Witnesses: SAMUEL G. BRYER, v 

